Replacing The Internal Pistons And The Seals And Spacers - Pentair Siata V132 SFE Installer Manual

Installer manual Siata V132 - SFE - Maintenance

9.2.9. Replacing the internal pistons and the seals and spacers

9.2.9.1 Disassembly
A
Note
The procedure to disassemble the inlet and outlet pistons is the same.
No.
A
Note
Use special tools from the 2238/05 kit to disassemble the valve internal parts.
A
Caution
Disconnect the inlet / outlet fitting before proceeding.
A Using a screwdriver, unscrew the screw (1).
B Remove the controller (2) from the valve (3).
C Using tool (6), unscrew the valve cap (11).
D Match the tool (5) with the piston hole and push to slip off the piston (4).
E Using tool (6), try to match the pins (8) of the tool in the ring nut's holes (9).
F Using tool (6), unscrew and remove the ring nut (10).
G Place tool (5) inside the valve and pull until you slip off the seals and spacers pack (7).
Caution
A
Do not forget the correct sequence of the seals and spacers pack (7). If you reassemble the
pack incorrectly, the valve will not work properly.
A
Note
The sequence of the seals and spacers is different for the valve inlet and outlet.
H If necessary, change the piston (4) and the seals and spacers pack (7).
I Replace and grease all the O-rings with silicone grease (cod. 8500).
Note
A
Take care not to mix up the inlet and outlet pistons (the inlet piston is bigger than the outlet
piston).
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Operation
Ref. MKT-IM-003 / B - 19.04.2017